Dear Sirs and Ma’ams,
Can anyone help me fill in the blanks in data in my chart, below? Any metallurgists or engineers out there?
I found a source of very dense tungsten shot (http://www.tungsten-spheres.com/tungsten_shot.html ) at ~17.5g/cu.cm and began a search for the properties of this shot as compared to lead and other shot materials. The data on the tungsten is from an email to the company, other data scoured from web searches.
Tungsten Ball AMS-T-21014: Class 2 (W 93%;Ni 4%; Fe 3%)
Density (g/cc) ~17.5
Tensile strength (Mpa) ~955
Yield strength (Mpa) ~880
Elongation (%) ~21.5
Hardness (HRC) ~29 (~290 on Vickers Diamond Pyramid Hardness scale)
Impact toughness (J/cm2) ~115
Lead Shot
Density (g/cc) 11
Tensile strength (Mpa)
Yield strength (Mpa)
Elongation (%)
Hardness (HRC)
Impact toughness (J/cm2)
Hevi-Shot (Tungsten Fe-Tin-Nickel alloys, Environ Metal, etc)
Density (g/cc) 12-13
Tensile strength (Mpa)
Yield strength (Mpa)
Elongation (%)
Hardness (HRC) (67 on HRB)-21 on HRC (120-235 on Vickers-Diamond Pyramid hardness scale)
Impact toughness (J/cm2)
Bismuth (also, sintered tungsten polymer, Kent, etc)
Density (g/cc) 9.4-10.4
Tensile strength (Mpa)
Yield strength (Mpa)
Elongation (%)
Hardness (HRC) “way soft” (35 on DPH)
Impact toughness (J/cm2)
Steel shot (soft cold-rolled- Fe alloys)
Density (g/cc) 7.9
Tensile strength (Mpa)
Yield strength (Mpa)
Elongation (%)
Hardness (HRC) (~2-2.5x hardness of lead) (90-120 on Diamond Pyramid Hardness)
Impact toughness (J/cm2)
I am going to try to work up loads for these tungsten balls for shotguns. They make .315 spheres that fit neatly into most 410 wads, in particular the Ballistics Products TPS wads. Ideally, I would like to maximize penetration at low velocities to make a useful multi-ball load for the current, faddish 410 revolvers; which suffer from in-bore pellet deformation reducing penetration and pattern. So the resistance to compression is of interest, but also their ability to not pulverize on impact.
This is the beginning of a fun project. SO thanks so much for your expertise.
C-
Can anyone help me fill in the blanks in data in my chart, below? Any metallurgists or engineers out there?
I found a source of very dense tungsten shot (http://www.tungsten-spheres.com/tungsten_shot.html ) at ~17.5g/cu.cm and began a search for the properties of this shot as compared to lead and other shot materials. The data on the tungsten is from an email to the company, other data scoured from web searches.
Tungsten Ball AMS-T-21014: Class 2 (W 93%;Ni 4%; Fe 3%)
Density (g/cc) ~17.5
Tensile strength (Mpa) ~955
Yield strength (Mpa) ~880
Elongation (%) ~21.5
Hardness (HRC) ~29 (~290 on Vickers Diamond Pyramid Hardness scale)
Impact toughness (J/cm2) ~115
Lead Shot
Density (g/cc) 11
Tensile strength (Mpa)
Yield strength (Mpa)
Elongation (%)
Hardness (HRC)
Impact toughness (J/cm2)
Hevi-Shot (Tungsten Fe-Tin-Nickel alloys, Environ Metal, etc)
Density (g/cc) 12-13
Tensile strength (Mpa)
Yield strength (Mpa)
Elongation (%)
Hardness (HRC) (67 on HRB)-21 on HRC (120-235 on Vickers-Diamond Pyramid hardness scale)
Impact toughness (J/cm2)
Bismuth (also, sintered tungsten polymer, Kent, etc)
Density (g/cc) 9.4-10.4
Tensile strength (Mpa)
Yield strength (Mpa)
Elongation (%)
Hardness (HRC) “way soft” (35 on DPH)
Impact toughness (J/cm2)
Steel shot (soft cold-rolled- Fe alloys)
Density (g/cc) 7.9
Tensile strength (Mpa)
Yield strength (Mpa)
Elongation (%)
Hardness (HRC) (~2-2.5x hardness of lead) (90-120 on Diamond Pyramid Hardness)
Impact toughness (J/cm2)
I am going to try to work up loads for these tungsten balls for shotguns. They make .315 spheres that fit neatly into most 410 wads, in particular the Ballistics Products TPS wads. Ideally, I would like to maximize penetration at low velocities to make a useful multi-ball load for the current, faddish 410 revolvers; which suffer from in-bore pellet deformation reducing penetration and pattern. So the resistance to compression is of interest, but also their ability to not pulverize on impact.
This is the beginning of a fun project. SO thanks so much for your expertise.
C-